Move to typical go project layout, fix golangci-lint warnings, update deps

internal/lib/ionice_other.go

@@ -0,0 +1,16 @@
+//go:build !linux
+// +build !linux
+
+package lib
+
+import proc "github.com/shirou/gopsutil/v3/process"
+
+func GetIOPriority(which int, who int) (prio uint32, err error) {
+	return 0, NotImplementedError
+}
+
+func SetIOPriority(which int, who int, prio uint32) (err error) {
+	return NotImplementedError
+}
+
+func IORenice(cnf Config, p *proc.Process, processName string) {}